Add support for POST/DELETE policy_sets/:policy_set_id/relationships/projects

[Netra2104]

Description

User should be able to add/remove policy sets using POST/DELETE policy_sets/:policy_set_id/relationships/projects in the policy_set resource similar to AddWorkspace and RemoveWorkspace.

Testing plan

Integration test is added to complete the testing plan

External links

Related PR

Output from tests

Including output from tests may require access to a TFE instance. Ignore this section if you have no environment to test against.

$ envchain go-tfe go test -run TestPolicySetsRemoveWorkspaces -v ./...                                                
=== RUN   TestPolicySetsRemoveWorkspaces
=== RUN   TestPolicySetsRemoveWorkspaces/with_workspaces_provided
=== RUN   TestPolicySetsRemoveWorkspaces/without_workspaces_provided
=== RUN   TestPolicySetsRemoveWorkspaces/with_empty_workspaces_slice
=== RUN   TestPolicySetsRemoveWorkspaces/without_a_valid_ID
--- PASS: TestPolicySetsRemoveWorkspaces (4.10s)
    --- PASS: TestPolicySetsRemoveWorkspaces/with_workspaces_provided (0.30s)
    --- PASS: TestPolicySetsRemoveWorkspaces/without_workspaces_provided (0.00s)
    --- PASS: TestPolicySetsRemoveWorkspaces/with_empty_workspaces_slice (0.00s)
    --- PASS: TestPolicySetsRemoveWorkspaces/without_a_valid_ID (0.00s)
PASS
ok      github.com/hashicorp/go-tfe     5.069s
?       github.com/hashicorp/go-tfe/examples/configuration_versions     [no test files]
?       github.com/hashicorp/go-tfe/examples/organizations      [no test files]
?       github.com/hashicorp/go-tfe/examples/registry_modules   [no test files]
?       github.com/hashicorp/go-tfe/examples/state_versions     [no test files]
?       github.com/hashicorp/go-tfe/examples/users      [no test files]
?       github.com/hashicorp/go-tfe/examples/workspaces [no test files]
?       github.com/hashicorp/go-tfe/mocks       [no test files]

envchain go-tfe go test -run TestPolicySetsAddWorkspaces -v ./...
=== RUN   TestPolicySetsAddWorkspaces
=== RUN   TestPolicySetsAddWorkspaces/with_workspaces_provided
=== RUN   TestPolicySetsAddWorkspaces/without_workspaces_provided
=== RUN   TestPolicySetsAddWorkspaces/with_empty_workspaces_slice
=== RUN   TestPolicySetsAddWorkspaces/without_a_valid_ID
--- PASS: TestPolicySetsAddWorkspaces (3.07s)
    --- PASS: TestPolicySetsAddWorkspaces/with_workspaces_provided (0.24s)
    --- PASS: TestPolicySetsAddWorkspaces/without_workspaces_provided (0.00s)
    --- PASS: TestPolicySetsAddWorkspaces/with_empty_workspaces_slice (0.00s)
    --- PASS: TestPolicySetsAddWorkspaces/without_a_valid_ID (0.00s)
PASS
ok      github.com/hashicorp/go-tfe     3.303s
?       github.com/hashicorp/go-tfe/examples/configuration_versions     [no test files]
?       github.com/hashicorp/go-tfe/examples/organizations      [no test files]
?       github.com/hashicorp/go-tfe/examples/registry_modules   [no test files]
?       github.com/hashicorp/go-tfe/examples/state_versions     [no test files]
?       github.com/hashicorp/go-tfe/examples/users      [no test files]
?       github.com/hashicorp/go-tfe/examples/workspaces [no test files]
?       github.com/hashicorp/go-tfe/mocks       [no test files]

[hashicorp-cla]

All committers have signed the CLA.

[brandonc]

Nonblocking feedback only. Looks great!

[brandonc]

Great!

[github-actions]

Reminder to the contributor that merged this PR: if your changes have added important functionality or fixed a relevant bug, open a follow-up PR to update CHANGELOG.md with a note on your changes.